Train-speed computer and indicator.



i f x Prmoumn 111mm PEB'. a, 11610;`

Patented aan., 16;'1912.

2 SHEETS-BRESIL mm E@ L S 'DUMONT LOVE, OF CHICAGO, lLLINOIS.

TRAIN-SPEED COMPUTER AND INDICATOR.

Specification of Letters latent.

PanteaJan. 16,1eia.

Application filed February `3, 1910. Serial No. 541,944..

To all whom t may concern Be it known that I, DUMONT LovE, a cit-izen of the United States, and resident of the city of Chicago, county of Cook, and State of Illinois, have invented certain new and' useful AImprovements in Train-Speed Computers and Indicators, of which the followf ing is a full, true, and exact description, such as will enable others skilled in the art to which it appertains t-o carry out, make,

and use the same.

My invention relates to direct reading indicators and has special'reference to an indicator designed to exhibit a result of a definite calculation in relation to a given component factor.

The principal object of the invention is to provide an easy means of quickly ascertaining the result of a definite calculation vwhen a given component factor is known.

Further, my object is to. provide a direct reading indicator which is arranged to indicatel the miles per hour at which a train is running when the number of seconds which it requires in which to run one mile is known.

My invention consists broadly in a direct reading indicator, provided with a series of numbers representmg one component factor of a computed result .and other series of numbers representing vcorresponding computed results bearing a definite calculated relation to the rst series and means where-I by when a number in the component series of numbers is exposed to view the corresponding number in the resultant series may be read, being so arranged that when a predetermined numberin the component series is exposed to view at one given point the corresponding calculated resultant will be exposed to view at another given point.

Further, the preferred formv of my invention consists in a direct reading indicator comprising a casing having sight openings therein, an indicator dial rotatable within said casing bearing on its face a series of numbers representing one component factor of a computed result,'a second series of numbers representing corresponding computed results bearing a definitev relation to the numbers of the first series, said openings and rows of numbers being so arranged on said dial that when a number in the component series is exposed to view at one ofvsaid openings the corresponding computed result will be exposed at another of said openings.

Further, and more specifically, the invention consists in a direct reading indicator comprising a casing, a rotatable indicator dial within said casing, said dial bearing on its face a series of numbers representing component factors of computed results, and two rows of numbers representing computed results, the numbers 'in each row thereof having corresponding numbers inthe component series, a sight opening in the casing for each row of numbers, the several openings and series of numbers being so related that when certain of the numbers in the component series are exposed to view the corresponding computed result in yone ofthe other rows will be exposed to View at the opening corresponding to said row and when certain other numbers in the component series are exposed to view the corresponding computed result in the other row will be exposed to view at, the opening of that row and a shutter adapted to cover one or the other of said openings.

Further, and more particularly, my invention consists in features of construction andin combinations of parts all as hereinafterv fully described and all pointed out in the claims.

Reference to the accompanying drawings forming a part of this specification, will lead to a clear understanding of the invention. ln said drawings I have illustrated one of many embodiments of my invention.

Figure l of the drawings is a face-view of an indicator embodying my invention; Fig. 2 is a transverse sectional view shown on the irregular line 2 2 of Figa-1; Fig. 3 is a vertical sectional view on the line-3 3 of Fig. 2 showing the obverse side ofthe index plate illustrated in Fig. l; Fig. 4E is a face-view of the reverse side of the indicator; Fig. 5 is a sectional view, similar to that shown in Fig. 3, but showing the reverse face of the `dial. F ig. 6 is a fragmentarysectional View on the line 6-6 of Fig. 5 to clearly show the movable slide; Fig. 7 is a view in elevation of one face of an indicator illustrating some slight modifications of details.

ln said drawings, 2 is a casing made up of the twoflanged dish-like members or plates,'3 and 4, having their circumferential edges, 5 and 6, respectively, flanged or turned inwardly and arranged to fit snugly. telescopically together. Said plates 3 and t are'held together to form the case 2. by the rivet or stud 7, centrally located and 'carrying the spacin including 96 and indicates, in the illustrated embodiment of my invention, the number of seconds consumed by. a train to travel or pass one mile. Between the ends, and oc'cupying one space in the series, is a star character. vThe second and third series, 11 and 12 respectively, represent the number of miles per hour which an object will travel if it. requires any one of the number of seconds shown in series, 10, to travel one mile, the outer'series of the two, or series 11, being the number of miles corresponding with the even seconds and the inner of the two, or series 12, being'the number of miles corresponding withthe odd seconds. rlhe figures of the resultant series are arranged in two rows which permits them to be large enough to be easily read. v

The plate 3 of the caseis provided with three sight openings,'13, 14 and 15, through which the numbers of the series,"10, 11 and 12, respectively, may be read. Said opening 13 is adjacent the upper edge .or top of the case and the outer two are placed at either side 'and near the bottom for reasons explained hereinafter.

As shown in Fig. 1, the opening, 14, is marked Even and the opening 15 is marked Odd rand the plate has printed upon itsjace the following: To find miles per hour count number of seconds taken in traveling one mile, turn central disk to the right until number shows in starred opening. Move slide at bottom to left, and miles per hour from even numbers of seconds appear in Even hole; move slide to right and miles' per hour from odd numbers of seconds appear in Odd hole.

The index disk, 9, has a milled or serrated outer edge, 9', and the case, 2, is cut away at its upper. portion forming the notch 2 to expose said milled edge to permit of the easy rotation of the disk in an obvious manner. The outer series of numbers, 10, is arranged 'contrary clock-wise so that to bring the numbers in same to view through the opening, 13, in an increasing ratio it is necessary to move the upper edge of the disk to the right or as one would naturally move it with the finger when holding the case in the hand. The numbers of the series 1l and 12 are so placed in relation to the numbers in row 10 that when an even number of seconds is exposed through the opening 13 the number of miles indicated by Same in row 11 is exposed through opening 14, and when an odd numberof seconds appears in opening 13 the corresponding number ofmiles can be seen on series 12 through opening 15.

To prevent confusion and make it possi ble to read none but the correct answer, a movable slide, 16, fan-shaped in side elevation, is -pivotally mounted on said centerpin,` 7, within said case between the index plate, 9, and the case, 2, and isprovided with openings, 17 and 18, arranged to register with the openings 14 and 15respectively, when at opposite limits of its movement. A handle or thumb-piece, 19, integral with said slide, 16, projects through a suitable slot or opening, 20, in the lower side wall of said case, 2, 2 the flanges of same being cut away and the end walls of said slot forming stops to engage the edges of said thumb-piece, 19, to limit its movement. The said openings 17 and 18 in said slide are spaced closer together than the openings 14 and 15 in the case, 2, and consequently when the slide is moved to one'limit of its movement, to'cause one of its openings to register with thecorresponding opening of the case, the other vopening of the slide will lie at one side of its corresponding opening inthe case and the number immediately under said opening will be covered. Said slide is U-shaped, as indicated in Fig. 6, and embraces said index disk, 6, one side being practically a duplicate ofthe other and arranged to operate similarly. The reverse side ofthe said indicator, opposite to the side hereinbefore described, as illustrated in Figs. 4 and 5, is

exactly similar to the reverse side shown in Figs. 1 and 3, except that the seconds per mile are continued in an ascending series or from 97 to 157, inclusive, and the numbers in the corresponding inner series are increasingly larger in like proportion. Thus the, instrument, as illustrated, indicates the` milesper hour for a variation of running time from 36 seconds to one mile to 157 sec-- onds for the same distance. F or'instance, as shown in Fig. 1, if 95 secondsy are consumed in -traveling one Amile the speed or mile per hour may be indicated by the appearance of the figures 37.9 in the Odd opening. It will be understood that the series of numbers may be' varied in any desired manner to suit the purpose for which the indicator is to be used without departing from the spirit of the invention. Each of the inner series of figures are provided with a star in the space between the ends of the series of numbers and when the star in4 the first or outer row of numbers appears in opening, 13, a star will .also appear in each of the openings 14 and 15 when exposed by the slide 16.

In Fig. 7 some slight modifications are illustrated. In Figs. 1 to 5 the notch 2 of the case 2 is shown as cutting into the open- Y rotatable within saidcasing havinga series ing 13. In Fig. 7 a slight guard or bar, 21,

is left between said notch 2 and opening 13 to give a more-finished appearance.

It is desirable when the movable slide, 16, is in its central position or midway between its stops, t-hat both of the springs 15 and 16 shall be closed by same to prevent the entering of dust. This is clearly indicated in Fig. 7 in which the slide, 16, is shown in its central position and its openings, 17 and 18, are shown in dotted lines and are seen to be located toward the center from said openings, 15 and 16, of the case, registering with neither of them in this position.

In use, the operation of my invention is very simple. The indicator disk is prepared to indicate the computed results corresponding to a series of component factors, for instance, such'as the number of miles a train will run` in an` hour when the number of seconds which it occupies in going onemile is known.A

To use the device to lind the number of miles per hour-at which a train is traveling, the number of seconds which it consumes in passing one mile being known, the indicator dial is rotated until this number appears in opening 18, then if the number of seconds is Ieven, the slide, 16, is moved to the left and the result or number of miles per hour appears in opening 14. Shou'ldfthe number of seconds per mile be odd, the slide is moved to the right and the resultor miles per hour appears at opening 15.

Having thus fully described my invention, what I claim and desire to secure by Letters Patent is: n

1. In a direct reading indicator, the combination with a casing, of an indicator dial rotatable within said casing havinga series of numbers arranged in a circle'adjacent to its edge, and two rows'of numbersvarranged in smaller concentric circles, said larger circle of numbers representing one component factor of a computed result, the numbers in one of said smaller circles representing computed results corresponding with certain of the numbers in said larger row and the numbers in the othery smaller circle representing computed results corresponding with certain other numbers in the larger row, sight openings in said casing corresponding witheach of said rows of numbers through -which single numbers of each row may be viewed, and a movable shutter within said casing having a limited more ment and controlling the sight openings through which the numbers of said smaller circles can be viewed, and adapted, when placed in its limiting positions, to open one of said sight openings and close the other, substantially as described.

2. In a direct reading indicator, the ccmbination with a casing, of an indicator dial of numbers arranged in a circle adjacent t0 itsedge,.and two rows of numbersl arranged in smaller concentric circles, said larger circle of numbers representing one component factor of va computed result, the numbers in one of said smaller circles' representing computed results corresponding with certain of the numbers in said larger row said openings through the shutter being spaced to preventboth thereof -registering with their opposed openings at the same time, substantially as described.

. 3. Ina direct reading indicator, the combination with a casing, of an indicator dial rotatably mounted within same and bearing on its face a series of consecutive numbers arranged in a circle adjacent to its edge and.

representing component factors of computed results, and a series of computed re- .sults corresponding with said component factors and arranged in two smaller circles concentric with the circle of component factors, the numbers in one of said smaller circles representing computed results related to evennumbers in the circle of component factors, and the numbers in the other of said smaller circles representing computed results corresponding with the odd numbers in the circle of component factors, said casing being provided with sight openings through which one of the numbers in each of said circles can be viewed at a time, and a shutter within said casing having a .limited movement and adapted at one of its limits to uncover the sight opening through which the numbers of one of said smaller circles can be viewed and at the same timeto close the opening through which the numbers of the other smaller circle can be viewed and vice versa, vsubstantially as described.

4. In a direct reading indicator the combination with a casing, of an indicator dial rotatably mounted within same and bearing on its face three concentric rows of numbers, the outer row comprising consecutive num bers representing component factors Ofcomputed results, and one of the inner concen tric rows of numbers representing computed results corresponding with the even numbers in said outer row, and the other of said inner rows representing computed results correspending with the odd numbers .in said outer row, said casing being provided with sigh't openings corresponding with each of said concentric rows of numbers, a shutter mounted within said casing and having a limited movement and adapted at one limit of its movement to close the sight opening corresponding with one of said inner rows of numbers and open the sight opening correspending with the other of said inner rows of numbers, and .vice versa, and means on said casing indicating which of the sight openings the shutter should uncover to eX- pose to View the computed result corresponding with any specific number in the circle of component Y factors, substantially as described.

5. In a direct reading indicator having its obverse yand reverse sides similarly formed, the combination with a casing, of an indicator dial rotatably mounted within same bearing on each face a series of consecutive numbers representing component factors of computed results arranged thereon in a circl e adjacent to its edge and two smaller concentric circles of numbers representing computed results, the numbers in one of said smaller rows corresponding with the even numbers of said outer row and the numbers in said other smaller circle corresponding with the odd numbers in said outer row, said casing having sight openings in each side for each row of numbers, a shutter in said casing having a limited movement and controlling the sight openings through which the numbers of the smaller circles on each side of the dial can be viewed, and adapted .at one limit of its movement to close one of said sight openings on each side of the indicator, and at the other limit of its movement to close the opposite opening on each side of the indicator, and means on said casing indicating which of the sight openings should be uncovered to correspond with any Specic number exposed in the sight opening of the component factors, substantially as described.

ponent factors of computed results and arranged in a circle adjacent .to its edge,- and a'series of numbers representing compu circles corresponding with the even numbers in said larger circle and the numbers in the other of said smaller circles corresponding with the odd numbers in said larger circleJ said casing havingy sight `openings in each side through which a single number of each of t-he concentric rows of numbers can be viewed, a shutter within the casing movably mounted upon said pivot and controlling the 4openings in each side of the casing corresponding with the smaller circles 'of numbers, sai/d casing having a slot in its edge and s aid shutter having a thumb pice projecting through said slot by which it can be moved, thethumb piece and the ends of the slot coperating to limit the movement of said shutter, and said shutter being adapted at one limit of its movement t9 uncover one of the openings in said casing in each side corresponding with one of the smaller circles of numbers and at the other limit of its movement to uncover the opening in each face of the casing corresponding with the other smaller circle of numbers, substantially as described.

In testimony whereof, l have hereunto set my hand, .this 29th dayl of January, 1910, in the presence of two subscribing witnesses.

EDWARD T. WILSON, JOHN R. LEFEVRE.

results arranged in two smaller concentriccircles, the numbers 1n one of said smaller" 

